Mouse lagging in Photoshop 2018 running HighSierra on macOS

This issue has been happening for me for the last week or so at least, making photoshop completely useless for me unfortunately. My mouse lags really badly when rolling over the canvas area in Photoshop (it works smoothly when rolling over the palettes and toolbars/menu of the Photoshop window). And it works fine in all other programs. I'm assuming it's a memory/processor thing?

Things I've tried that haven't helped:

turned off graphics processor

reset preferences

updated photoshop

changed my history states from 50 to 21

unchecked all boxes in the Plug-ins panel

restarted a bunch of times after doing all of these things

I typically have photoshop, illustrator, sketch, adobe acrobat, Chrome, Slack and Numbers open at the same time.

I would first try closing all other programs and try PS. 16gb sounds like a lot of ram but todays programs gobble up memory like candy. I'm running 32g and if I have more than three programs running I start noticing some lag. Besides, the latest version of PS has a memory leak.

Thanks so much John. I restarted my whole computer and that helped for now. I've done that before and it always comes back, but at least that's a temporary fix for when I'm super busy and just need it to function. I mostly work in Sketch thankfully. Good to know about the "memory leak". I'm not sure what that is but hopefully it's something that will be fixed! :D